Fermi FT2 Spacecraft Pointing Files

This utility permits you to download the most current version of the spacecraft (FT2) file predicting the LAT's pointing for a given mission week. The FT2 file is a FITS-formatted file describing Fermi's position and orientation, and thus the LAT's pointing, as a function of time. The FT2 files available here are created in planning Fermi's timeline, and thus provide the observatory's predicted pointing for a given mission week. Files with the string 'PRELIM' in the filename are produced approximately three weeks in advance, while files with 'FINAL' in the filename describe the timeline that will be uploaded to the spacecraft; thus you should use the latter if available. Note that the actual LAT pointing may differ from the predicted as a result of Target-of-Opportunity observations or Autonomous Repoints in response to a bright gamma-ray burst.

Data and Resources

Additional Info

Field Value
Maintainer Phil Newman
Last Updated February 19, 2025, 11:35 (UTC)
Created February 19, 2025, 11:35 (UTC)
accessLevel public
accrualPeriodicity irregular
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harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier NASA-0000235
issued 2018-06-25
landingPage http://fermi.gsfc.nasa.gov/ssc/observations/timeline/ft2/
modified 2020-01-29
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publisher National Aeronautics and Space Administration
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